﻿/************************************************************************

   Extended Silverlight Toolkit

   Copyright (C) 2010-2012 Xceed Software Inc.

   This program is provided to you under the terms of the Microsoft Public
   License (Ms-PL) as published at http://extendedsilverlight.codeplex.com/license

   Please purchase a commercial version of this toolkit if you are using
   it in a commercial product. The commercial versions support the project,
   and also include more features for each control, priority support,
   source code, updates, removed watermark, and a proprietary license.

   Visit http://xceed.com and follow @datagrid on Twitter.

  **********************************************************************/

using System;

namespace Xceed.Silverlight.Data
{
  internal interface IGroupEnumerator : IAsyncEnumerator<DataPath>
  {
    IAsyncResult BeginGroupItemCount( DataSourceContext context, DataPath groupPath, AsyncCallback userCallback, object asyncState );
    EstimateInt64 EndGroupItemCount( IAsyncResult asyncResult );

    // These calls allow bypassing the collapsing of header and footers and return all DataPaths.
    // This allows access to the group items for the GroupContext.
    IAsyncResult BeginGetBaseItems( JumpMoveAndFetchParameters parameters, AsyncCallback userCallback, object asyncState );
    JumpMoveAndFetchResult<DataPath> EndGetBaseItems( JumpMoveAndFetchAsyncResult jumpMoveAndFetchAsyncResult );
  }
}
